Finance Leases	9 Months Ended
	Sep. 30, 2020
Debt Disclosure [Abstract]
Finance Leases	Finance LeasesFinance lease obligations consist of seven leases with two financing companies, collateralized by Gamma Knife units and PBRT equipment, the individual customer contracts, and related accounts receivable at September 30, 2020. As of September 30, 2020, obligations under finance leases on the Condensed Consolidated Balance Sheets were $9,432,000. See disclosure of future payments below under the heading “Commitments”.